A man swims across the river which flows with a velocity of 3 km/h due east.if the velocity of man relative to water is 4 km/h due north, then How long does he take to across the river if the river is 1 km wide?

A man swims across the river which flows with a velocity of 3 km/h due east.if the velocity of man relative to water is 4 km/h due north, then What is his velocity relative to the shore of the river?

A man swims across the river which flows with a velocity of 3 km/h due east.if the velocity of man relative to water is 4 km/h due north, then How far from his starting point will he reach the opposite bank?

The width of a river is D. A man can cross the river in time t_1 in the absence of any river current. But in presence of a certain river current, the man takes a time t_2 to cross the river directly. Show that the velocity of the current is v=D sqrt((1)/(t_1^2)-(1)/(t_2^2))

Velocity of a boat in still water is 5km*h^(-1) . It takes 15 min to cross a river along the width. The river is 1km wide. Find the velocity of current.

An athlete runs with a velocity of 18 "km.h"^(-1) . How much distance will he cover in 10 min?